Which of these is the BEST explanation for the declining percentage of foreign-born people in the United States between 1910 and 1940?
A) declining U.S. birth rate
B) improved economic conditions in Europe during the 1920s
C) more restrictive immigrations policies in the United States
D) post World War II conditions in both Europe and the United States
The best explanation for the declining percentage of foreign-born people in the United States between 1910 and 1940 would be "C) more restrictive immigrations policies in the United States," since there was a heavy "Nativist" sentiment in the US during this time.
